t has been documented that zms can alter their environment by increasing ammonium and nitrate There have been a number of documented changes in water chemistry, water clarity Decreases in plankton production mean less food for fish
economic impacts The photo on the right The zms can occur at extremely high densities growing over each other in like cancerous cells. They can reag such high densities can clog intake pipes for industrial applications. Congressional researchers estimated that an infestation of zebra mussel in the Great Lakes cost the power industry alone $3.1 billion in the 1993-1999 period